package daily;

import java.util.UUID;

/**
 * @Date 2022/4/24
 * @Created by Jonathan
 */
public class StringDemo {
    public static void main(String[] args) {
        final String join = String.join(".", "1", "1");
        System.out.println(join);
        System.out.println(UUID.randomUUID().toString().replace("-", "").substring(0, 20));
//        join = "";
    }
}
